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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 3 Configuring Remote Access to MPLS VPN
Configuration Tasks for RA to MPLS VPN
• Configuring PPPoE over Ethernet Virtual Connections and Applying Virtual Templates, page 3-20
• Configuring RBE over ATM Virtual Connections, page 3-22
Configuring a Virtual Template Interface
To create and configure a virtual template interface, enter the following commands beginning in global
configuration mode:
Example 3-4 Configuring a Virtual Template Interface
interface virtual-template 1
ip unnumbered Loopback1
no peer default ip address
ppp authentication chap vpn1
ppp ipcp ip address required
ppp authorization vpn1
ppp accounting vpn1
Monitoring and Maintaining a Virtual Access Interface
When a virtual template interface is applied dynamically to an incoming user session, a virtual access
interface (VAI) is created. You cannot use the command line interface (CLI) to directly create or
configure a VAI, but you can display and clear the VAI by using the following commands in privileged
EXEC mode:
Example 3-5 Displaying the Active VAI Configuration
Router# show interfaces virtual-access 1.1 configuration
!
interface virtual-access1.1
ip vrf forwarding vrf-1
ip unnumbered Loopback1
no ip proxy-arp
Command Purpose
Step 1
Router(config)# interface virtual-template
number
Creates a virtual template interface and enters interface
configuration mode.
Step 2
Router(config)# ip unnumbered ethernet
number
Enables IP without assigning a specific IP address on the LAN.
Step 3
Router(config-if)# ppp authentication chap
Enables PPP authentication on the virtual template interface.
Step 4
Router(config-if)# ppp ipcp ip address
required
Required for legacy dial up and DSL networks. Prevents a PPP
session from being set up with 0.0.0.0 remote ip address.
Command Purpose
Router# show interfaces virtual-access number
[configuration]
Displays the configuration of the active VAI that was created using
a virtual template interface.
The configuration keyword restricts output to configuration
information.
Router# clear interface virtual-access number
Tears down the live sessions and frees the memory for other client
uses.